VOLUME instruction in Dockerfile

[augusto-sb]

Hello, the instruction:
VOLUME ['/etc/apache2/sites-enabled','/var/www','/var/log/apache2']
creates the following anonymous volume in the container:
[/etc/apache2/sites-enabled,/var/www,/var/log/apache2]
i think it is a Docker error but it can corrected using:
VOLUME /etc/apache2/sites-enabled /var/www /var/log/apache2

i hope it helps